package main;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Tools {
	
//	public static boolean checkInternet(Context c) {
//		ConnectivityManager connec = (ConnectivityManager) c.getSystemService(Context.CONNECTIVITY_SERVICE);
//		android.net.NetworkInfo wifi = connec.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
//		android.net.NetworkInfo mobile = connec.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
//		if (wifi.isConnected() || mobile.isConnected()) return true;
//		else return false;
//	}
//	
//	public static void toast(Context context, String message) {
//		Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
//	}
//	
//	public static void checkInternetAndToast(Context c) {
//		if (checkInternet(c))
//			toast(c, "Download error");
//		else 
//			toast(c, "Can not connect.Check network!");
//	}
	
	public static String MD5(String text) throws NoSuchAlgorithmException, UnsupportedEncodingException {
		MessageDigest md;
		md = MessageDigest.getInstance("MD5");
		byte[] md5hash = new byte[32];
		md.update(text.getBytes("iso-8859-1"), 0, text.length());
		md5hash = md.digest();
		return convertToHex(md5hash);
	}

	private static String convertToHex(byte[] data) {
		StringBuffer buf = new StringBuffer();
		for (int i = 0; i < data.length; i++) {
			int halfbyte = (data[i] >>> 4) & 0x0F;
			int two_halfs = 0;
			do {
				if ((0 <= halfbyte) && (halfbyte <= 9))
					buf.append((char) ('0' + halfbyte));
				else
					buf.append((char) ('a' + (halfbyte - 10)));
				halfbyte = data[i] & 0x0F;
			} while (two_halfs++ < 1);
		}
		return buf.toString();
	}

}
